US5512086A - High-efficiency air filtering apparatus - Google Patents

High-efficiency air filtering apparatus Download PDF

Info

Publication number
US5512086A
US5512086A US08/259,465 US25946594A US5512086A US 5512086 A US5512086 A US 5512086A US 25946594 A US25946594 A US 25946594A US 5512086 A US5512086 A US 5512086A
Authority
US
United States
Prior art keywords
filter
housing
blower
treatment system
room air
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US08/259,465
Other languages
English (en)
Inventor
Dov Z. Glucksman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Appliance Development Corp
Original Assignee
Appliance Development Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Appliance Development Corp filed Critical Appliance Development Corp
Priority to US08/259,465 priority Critical patent/US5512086A/en
Assigned to APPLIANCE DEVELOPMENT CORP. reassignment APPLIANCE DEVELOPMENT CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GLUCKSMAN, DOV Z.
Priority to DE19581669T priority patent/DE19581669T1/de
Priority to PCT/US1995/007212 priority patent/WO1995034366A1/fr
Priority to GB9622958A priority patent/GB2302292B/en
Priority to US08/591,827 priority patent/US5753002A/en
Application granted granted Critical
Publication of US5512086A publication Critical patent/US5512086A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0002—Casings; Housings; Frame constructions
    • B01D46/0005—Mounting of filtering elements within casings, housings or frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0086—Filter condition indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/88—Replacing filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2273/00—Operation of filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2273/30—Means for generating a circulation of a fluid in a filtration system, e.g. using a pump or a fan
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/39—Monitoring filter performance
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/34—Indicator and controllers

Definitions

  • the invention relates to a portable room air cleaner of very high efficiency, particularly to an air cleaner configured to circulate air in a room and to pass it by blower means through a user replaceable filter known under the name HEPA-filter (High-efficiency particulate air filter).
  • HEPA-filter High-efficiency particulate air filter
  • Filtration media capable of high filtration efficiencies for sub micron particles have been in wide use in "clean-room” applications and other hospital and industrial applications.
  • Media classified as HEPA are characterized by their ability to filter up to 99.97% of all airborne particles of a size of 0.3 micron and larger.
  • the HEPA media comprises a dense non-woven sheet of glass fibers held together with an organic binder. Due to its dense structure it causes a high pressure-drop in the air passing through it. The high pressure difference between up stream and down stream on the filter will cause a significant amount of unfiltered air to flow through any gap or opening that might exist around the filter or within the air cleaner structure propper.
  • a filter area three times as large would naturally last three times as long before necessitating replacement.
  • the necessity to enlarge the filter area without enlarging the overall face area of the filter assembly has led to the solution of folding the woven filter material into relatively small, closely spaced pleats.
  • spacers as e.g strings or strips coated with an adhesive spanned across the entire filter.
  • the most straight forward filter configuration would be that of a pleated HEPA-filter configured into a flat structure.
  • the advantages are simple construction, but with the inherent drawback that the air cleaner unit becomes very large in its frontal dimensions, and that the design imposes serious restrictions on the manner in which air is drawn into the blower inlet or inlets.
  • U.S. Pat. No. 4,629,482 discloses a portable air purifier having a generally cylindrical air filter mounted to receive incoming air through its peripheral surface sucked in by a vertical single inlet blower and delivered to the outside through circumferential outlet openings.
  • the design is advantageous in that it simplifies sealing of the filter in the cylindrical housing, but has a number of serious drawbacks, e.g.:--the design does not permit the use of a double-inlet blower which necessitates provision of a blower of larger diameter and consequently a larger housing. And the fact that the air outlets are near the floor prevents proper air circulation through the room.
  • the present invention has as its main object to accommodate a number of needs associated with the design of a portable air cleaner with high filtering efficiencies by incorporating a pleated HEPA-filter unit.
  • the air filtering apparatus includes essentially a front portion in the shape of a housing, a rear portion in the form of a filtering chamber and a blower unit partly enclosed by the housing and partly by the filtering chamber.
  • the blower is a double-inlet centrifugal blower having a horizontal axis and an air outlet extending through the frontal housing.
  • the housing comprises a bottom portion, an envelope and a top portion, and is open towards the filtering chamber in the form of a rectangular opening surrounded by a flange.
  • the blower outlet extends through the housing in airtight connection with all other portions of the housing likewise tightly sealed.
  • the filtering chamber comprises a filter sheet which is folded into a plurality of pleats and is curved into arch-shape with the axis of the arch extending substantially parallel to the flange of the housing.
  • the chamber is covered by a solid top and a solid bottom extending as far as the arch, leaving a rectangular opening surrounded by a flange which is coextensive with the flange on the housing.
  • Means are provided for urging the filtering chamber onto the housing and for tightly connecting the two components by means of the two flanges, with a compressible closed cell foam frame serving as a gasket.
  • a preferred embodiment of the air filtering apparatus of the invention is in the shape of a vertical cylinder of circular, elliptical or similar cross section and includes a housing occupying about half the frontal portion of the cylinder, a filtering chamber occupying the rear half of the cylinder, and a centrifugal double-inlet blower partly enclosed by said housing and partly by said arch-shaped filtering chamber.
  • the housing comprises a base, an envelope surrounding approximately one half of the frontal circumference of the apparatus and a top portion provided with an opening sealingly connected to the outlet of the blower.
  • the housing is tightly sealed all over and is open towards the rear in the form of a rectangle which is surrounded by a flange.
  • the blower includes a housing molded of a light-weight plastic material and is composed of two halves which are connected along the center line by tongue and groove to effect a leakage-proof seam.
  • the two halves contain the right and left inlet openings, each being covered by a cage composed of respective vertical and horizontal ribs, whereof one cage contains the electric motor directly coupled to the blower impeller.
  • the cages are rigidly connected to the upstanding portions of the housing base, thus securing the blower in position.
  • the blower outlet is sealingly connected to the respective openings in the top cover of the housing which is covered by a removable grille preventing access to the rotating parts.
  • the filtering chamber comprises a filter unit in the form of a HEPA-media sheet folded into a plurality of small pleats and bent in arch-shape with the pleats of a length about equal to the height of the opening in the housing and extending parallel to the arch axis.
  • the blower includes a housing molded of a semi-pliable plastic material and is composed of two halves which are connected along the center line by tongue and groove to effect a leakage-proof seam.
  • the two halves contain the right and left inlet openings, each being covered by a cage composed of respective vertical and horizontal ribs, whereof one cage contains the electric motor directly coupled to the blower impeller.
  • the cages are rigidly connected to upstanding portions of the housing base thus securing the blower in position.
  • the blower outlet is sealingly connected to the respective opening in the top cover of the housing which is covered by a removable grille preventing access to the rotating components.
  • the filtering chamber comprises a filter unit in the form of a HEPA-media sheet folded into a plurality of small pleats and curved in arch-shape with the pleats of a length about equal to the height of the opening in the housing and extending parallel to the arch axis.
  • the arch is preferably in the shape of a semi-cylinder of circular cross section, but parabolic, elliptical or any other rounded shape may be chosen, to suit the taste of the designer and the requirements of the total filter area.
  • a solid bottom and a solid top sheets are firmly attached to the two ends of the arch, and form-together with the ends of the arch-shaped filter unit--a rectangular opening surrounded by a frame and a flange which are coextensive with the opening and the flange of the housing.
  • the filtering chamber is urged upon the housing by a removable grille, with the two flanges pressed upon each other with a resilient gasket positioned there-between, to ensure air-tightness.
  • the filtering chamber is attached to the housing with its axis vertically directed and with its bottom inserted into a recessed portion of the base. The circumference and the top of the filtering chamber are enclosed by a grille which surrounds the outside of the filter in close alignment.
  • the inside contour of the grille corresponds to the outside contour of the filtering chamber and protects it against outside contact while holding it in position by a plurality of inwardly protruding lugs.
  • the grille is provided with a closed top which is connected to the rear border of the housing top, while its vertical edges contact the vertical edges of the envelope. Replacement of a used filtering chamber by a clean one is effected by removing the grille, tilting the chamber and pulling it out of contact with the housing.
  • a special flow meter is preferably mounted on the blower housing which will effect a warning light to be energized as soon as the difference between the air pressure inside and outside of the blower housing has reached a predesignated magnitude.
  • the apparatus is provided, in a conventional manner, with electric control means of the blower motor.
  • An ionizer unit is an optional feature to be mounted in special compartment of the housing base.
  • FIG. 1 is an isometric view of the air filtering apparatus with the filtering chamber separated from the housing
  • FIG. 2 is a side view of one embodiment of the apparatus
  • FIG. 3 is a top view of the apparatus of FIG. 1,
  • FIG. 4 is a rear view of the apparatus of FIG. 1,
  • FIG. 5 is a cross sectional view of the apparatus along line 5--5 of FIG. 3,
  • FIG. 6 is a side view of the apparatus of FIG. 2 with both the grille and the filtering chamber separated from the housing and blower unit.
  • FIG. 7 is a cross sectional view of the apparatus along lines 7--7 of FIG. 2,
  • FIG. 8 is a section of the blower unit along lines 8--8 of FIG. 5,
  • FIG. 9 is a top view of the blower unit
  • FIG. 10 is a side view of the blower unit
  • FIG. 11 is a partial top view and a partial cross section of the filtering chamber
  • FIG. 12 is a top view of the pleated filter unit in its flat condition
  • FIG. 13 is a top view of the filtering unit of FIG. 12, bent into semi-cylindrical shape,
  • FIG. 14 is a rear view of the filtering chamber
  • FIG. 15 is a view of the frame surrounding the filter unit in flat condition
  • FIG. 16 is a side view of a pressure sensor and indicator
  • FIG. 17 is an enlarged view of the top portion of the sensor and pressure indicator of FIG. 16.
  • FIG. 1 is a schematic drawing of an air filtering apparatus illustrating a blower unit II mounted in a housing I on the right of the drawing and a filtering chamber IV in the left. It also shows a gasket 48 attached to the flange of the filtering chamber, ensuring airtight connection between housing and filtering chamber.
  • a preferred embodiment of the air filtering apparatus includes a housing I, a blower unit II, a grille III and a filtering chamber IV, which can be better viewed in the exploded view of the apparatus shown in FIG. 6.
  • the housing I is made of a rigid plastic material and includes a base 10, an envelope 11 and a top portion 12.
  • FIG. 7 shows the base to be of circular shape, but it will be understood that an oval, elliptical or other oblong rounded shape will be suitable in order to accommodate the blower of the required filter area.
  • the rear portion of the base is flat and forms a recess 13 (FIG. 5) for accommodation of the filtering chamber, while the front portion is raised and forms a central portion 14 of a shape surrounding part of the blower housing and two flat side portions 15 designed to support the blower unit.
  • a pocket 16 is optional and may serve as a chamber unit for an ionizer unit.
  • the housing is open towards the rear and forms a rectangular flange 17 abutting on the flange of the filtering chamber IV with a gasket 48 placed in between.
  • the envelope 11 has a bottom edge 110 firmly connected to the front portion of the base and constitutes an integral unit with the top portion 12. It occupies about one half of the entire circumference and is provided with the above mentioned flange 17 along its vertical edges, which is continued at its bottom end by the front edge 17' of the recess 13 and at its top 17" in continuation of the top portion 12.
  • the top portion 12 (FIGS. 2 & 3) is vaulted and terminates in a curved rear edge 112 which carries a button 113 serving as a connector of the housing with the grille III.
  • the top portion is provided with a substantially square opening 114 which encloses the blower outlet in air sealed connection and is covered by an outlet grille 115.
  • a second opening in the top portion is covered by a removable cover 116 which contains the control elements of the apparatus, such as switches and indicator lights.
  • the grille III is best visible in FIG. 4 and 6. It comprises mainly a network 30 of vertical and horizontal ribs bent to the curvature of the base and surrounded along the bottom edge and along the vertical edges by solid frames 31 and 32 respectively.
  • the grille is provided with a top cover 33 the shape of which can be best viewed in FIG. 3, showing that its front border 34 corresponds to the rear border 112 of the housing top 12.
  • the grille can be released from connection with the housing by pressure on button 113 permitting removal of the grille for replacement of the filter unit, by the user. By slightly tilting and lifting the grille out of channel 17 of the base the grille can be completely removed for exchange of the filter unit.
  • blower is illustrated in all details in FIGS. 5, 7, 8, 9 and 10, likewise showing its firm positioning inside the housing.
  • the blower unit II is constructed out of two essentially mirror-imaged halves 22a & 22b. It is molded out of expended polystyrene beads into a light weight semi-pliable structure.
  • the two blower housing halves 22a & 22b are made to intermesh at their joint surfaces by a tongue 23 and groove 24 detail which provides a leakage-proof seam.
  • two rigid frames, or braces 25a & 25b are provided which are screwed to each other at their extremities and actually cause the tongue and grove detail to compress to enhance the tightness of the seam.
  • Each of the rigid frames are provided with a cage shaped center portions 26a & 26b which project away from the blower housing and which cover the two air inlet openings of the blower housing.
  • Both cages including horizontal and vertical ribs which form a multitude of openings 27, large enough to permit air flow, yet small enough to prevent physical access to the blower wheel 28 or the electric motor 21, which is located in one of the enclosures.
  • the uniqueness of this design is as follows;
  • the frames 25a and 25b with their enclosures 26a & 26b provide the force needed to seal the blower housing halves to each other, they provide rigid anchorage points to the rest of the structure, they safely enclose the motor and prevent contact with the blower wheel 28 which would otherwise be exposed to the outside after the filter IV has been removed.
  • the frames provide the alignment between motor and blower housing which is critical in order to optimize blower performance and sound.
  • FIG. 9 shows the top view of the blower housing with its outlet 29, surrounded by a flange 30.
  • the flange 30 is tightly squeezed between a frame 12 that is part of the main housing and is shown in FIG. 5 and the outlet grille outer frame, thereby compressing the blower outlet frame and creating a perfect air tight seal.
  • the semi pliable foam housing is trapped in a molded frame that surrounds the air outlet of the unit, thereby eliminating the need for a special seal or gasket which would have been required had the blower housing been molded of a rigid plastic.
  • FIGS. 11-15 which describe the filter element and its support structure.
  • the filter proper consists of a pleated glass fiber media in which the pleats are spaced apart by means known in the art: For example by a series of beads of hardened glue (not shown).
  • the glue is dispensed and adheres to the surface of the media before it is pleated, during the pleating operation the glue sticks to itself, forming a series of rigid barriers that prevent the pleats from collapsing against each other. While in some instances it is preferred to have the spacers placed on both sides of the pleated media, for extra support. In the present embodiment it is preferable to have the beads applied only to the "down-stream" side of the media, as would be discussed henceforth.
  • a double inlet blower housings can be located within the confines of the semi cylindrical filter structure as shown in FIG. 7 with little obstruction to the air entering the blower housings inlets.
  • a filter-support-frame is molded as a flat frame with two elongated parallel channels 42a & 42b and two solid semicircular panels 43a & 43b each provided at their peripheral extremity with a channel 44a & 44b similar in cross section to the two side channels 42a & 42b and which connects with the elongated channels to form a continuous channel.
  • the semi circular panels are connected to the parallel channel ends by what is known in the art as a "living-hinge" 45 namely a very thin webbing connects the two parts which allows the panels to be hinged at will in relation to the channels.
  • the filter-support-frame is placed on the assembly table in its flat condition with the open channels facing up.
  • a fast drying glue commercially referred to "hot-melt” is dispensed into the continuous channel so that it forms a layer 49 approximately 1/8" (3 mm) high.
  • the flat pleated filter is now curved in a semi cylindrical shape and its two elongated extremities are placed in the elongated channels.
  • the two semicircular panels 43a & 43b are now hinged upwards so that they end up at a right angle to the elongated channels and their semicircular channels trap the two open ends of the filter media.
  • the two semi circular panels are held in their position by a strap 50 of a predetermined length which bridges the two panels.
  • the glue is now allowed to solidify so that it forms an uninterrupted seal 49 around the entire extremity of the filter media.
  • the filter replacement indicator according to the invention is constructed and operates as follows:
  • FIGS. 16 & 17 show a tapered bore flow meter VIII which is positioned outside the blower housing so that it's lower opening 71 communicates with the interior of the blower housing and it's upper opening 72 communicates with the plenum surrounding the blower.
  • the suction head that the blower generates (which is equal to the pressure drop through the filter) will be proportional to the flow through the flow meter.
  • the ball 73 in the flow meter tube will rise proportionally to the flow through the flow-meter which is also proportional to the pressure drop through the filter.
  • the ball in the flow meter When the pressure drop through the filter reaches a level at which the filter should be replaced, the ball in the flow meter would reach the top of the tapered tube.
  • the ball (which is made of brass, or plastic coated with a conductive coating) 23 reaches the top of the tube it contacts the pin 74 which stops it from rising any further; at that position the ball simultaneously contacts the tubular portion 75 of the eyelet 76 and the pin 74. By doing so the brass ball closes an electric circuit which causes the indicator light to turn on indicating the filter needs to be replaced.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
US08/259,465 1994-06-14 1994-06-14 High-efficiency air filtering apparatus Expired - Fee Related US5512086A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US08/259,465 US5512086A (en) 1994-06-14 1994-06-14 High-efficiency air filtering apparatus
DE19581669T DE19581669T1 (de) 1994-06-14 1995-06-07 Hocheffiziente Luftfiltervorrichtung
PCT/US1995/007212 WO1995034366A1 (fr) 1994-06-14 1995-06-07 Appareil de filtration d'air a grand debit
GB9622958A GB2302292B (en) 1994-06-14 1995-06-07 High-efficiency air filtering apparatus
US08/591,827 US5753002A (en) 1994-06-14 1996-01-25 High-efficiency air filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/259,465 US5512086A (en) 1994-06-14 1994-06-14 High-efficiency air filtering apparatus

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US08/591,827 Division US5753002A (en) 1994-06-14 1996-01-25 High-efficiency air filter
US09/025,759 Division US5984991A (en) 1996-01-25 1998-02-18 High-efficiency air filter

Publications (1)

Publication Number Publication Date
US5512086A true US5512086A (en) 1996-04-30

Family

ID=22985069

Family Applications (2)

Application Number Title Priority Date Filing Date
US08/259,465 Expired - Fee Related US5512086A (en) 1994-06-14 1994-06-14 High-efficiency air filtering apparatus
US08/591,827 Expired - Fee Related US5753002A (en) 1994-06-14 1996-01-25 High-efficiency air filter

Family Applications After (1)

Application Number Title Priority Date Filing Date
US08/591,827 Expired - Fee Related US5753002A (en) 1994-06-14 1996-01-25 High-efficiency air filter

Country Status (4)

Country Link
US (2) US5512086A (fr)
DE (1) DE19581669T1 (fr)
GB (1) GB2302292B (fr)
WO (1) WO1995034366A1 (fr)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5753002A (en) * 1994-06-14 1998-05-19 Appliance Development Corp. High-efficiency air filter
US5893939A (en) * 1997-12-11 1999-04-13 Holmes Products Corp. Air purifier and filter assembly therefor
EP0933601A2 (fr) * 1998-02-02 1999-08-04 Carrier Corporation Cadre de montage pour filtre
EP0933600A2 (fr) * 1998-02-02 1999-08-04 Carrier Corporation Purificateur d'air
US5984991A (en) * 1996-01-25 1999-11-16 Appliance Development Corp. High-efficiency air filter
US6425932B1 (en) 1999-07-07 2002-07-30 The Holmes Group, Inc. Air purifier
US6461396B1 (en) 1999-07-07 2002-10-08 The Holmes Group, Inc. Air purifier
US6610118B2 (en) 1999-07-07 2003-08-26 The Holmes Group, Inc. Air purifier
US20030208877A1 (en) * 2002-05-07 2003-11-13 Stanovich Michael A. Mobile air duct vacuum
US20040261376A1 (en) * 2003-06-26 2004-12-30 Morgan Lee Pendleton Pleated air filter with reverse pulsating air flow cleaning
US20050086918A1 (en) * 2003-10-24 2005-04-28 Honisch Michael J. Air cleaner assembly
US20070012192A1 (en) * 2005-07-14 2007-01-18 Access Business Group International Llc Air Treatment System
US20100251678A1 (en) * 2009-04-02 2010-10-07 General Electric Company Filter retention systems and devices
US8105409B2 (en) 2009-01-30 2012-01-31 General Electric Company Filter retention system
US20140168871A1 (en) * 2012-12-19 2014-06-19 Airbus Operations Sas Electronics structure comprising at least one barrier impermeable to fine particles
EP2799123A1 (fr) 2004-06-24 2014-11-05 Camfil Farr, Inc. Filtre à air plissé avec inversion de nettoyage d'écoulement d'air pulsé
CN104145111A (zh) * 2012-03-01 2014-11-12 斯堪尼亚商用车有限公司 过滤器外壳和过滤器单元
US20150020486A1 (en) * 2012-03-01 2015-01-22 Scania Cv Ab Filter housing and air filter unit for a combustion engine
JP2015196117A (ja) * 2014-03-31 2015-11-09 日本無機株式会社 フィルタエレメント、フィルタエレメント組立体、および空気清浄システム
US9631222B2 (en) 2014-03-14 2017-04-25 Particle Measuring Systems, Inc. Filter and blower geometry for particle sampler
CN108119264A (zh) * 2016-11-30 2018-06-05 丰田纺织株式会社 用于内燃机的筒状空气滤清器
US10119469B2 (en) 2016-09-15 2018-11-06 General Electric Company Method and apparatus for modularized inlet silencer baffles
US10385778B2 (en) 2017-01-06 2019-08-20 General Electric Company System and method for an improved inlet silencer baffle
US10550766B2 (en) 2017-01-06 2020-02-04 General Electric Company System and method for an improved inlet silencer baffle
US10722990B2 (en) 2016-09-15 2020-07-28 General Electric Company Method for installing and removing modularized silencer baffles
US11090598B2 (en) 2016-02-26 2021-08-17 Lg Electronics Inc. Air cleaner
US11364459B2 (en) * 2016-06-15 2022-06-21 Lg Lelectronics Inc. Air cleaner
US20220290882A1 (en) * 2021-03-15 2022-09-15 Shenzhen Vantop Technology & Innovation Co., Ltd. Air purifier
US11452961B2 (en) * 2016-02-26 2022-09-27 Lg Electronics Inc. Air cleaner
US11761455B2 (en) 2016-02-26 2023-09-19 Lg Electronics Inc. Air cleaner
CN117463705A (zh) * 2023-12-27 2024-01-30 四川合佳科技有限公司 一种用于物联网的无线通信模块的保护装置
US11938433B2 (en) 2016-02-26 2024-03-26 Lg Electronics Inc. Air cleaner

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6223548B1 (en) * 1998-03-20 2001-05-01 General Shelters Of Texas, S.B., Inc. Cooler housing apparatus and method of making the same
US6447586B1 (en) * 2000-12-06 2002-09-10 Whirlpool Corporation Air treatment appliance with a translucent body
US6471736B2 (en) * 2000-12-18 2002-10-29 Whirlpool Corporation Access apparatus for an air treatment appliance
DE10328002B4 (de) * 2003-06-21 2010-02-25 Mahle Filtersysteme Gmbh Ringförmiger, radial durchströmbarer Gas-Filtereinsatz
US8021457B2 (en) 2004-11-05 2011-09-20 Donaldson Company, Inc. Filter media and structure
CA2945592C (fr) 2004-11-05 2020-01-07 Donaldson Company, Inc. Milieu filtre et structure de filtre
US8057567B2 (en) 2004-11-05 2011-11-15 Donaldson Company, Inc. Filter medium and breather filter structure
EA011777B1 (ru) 2005-02-04 2009-06-30 Дональдсон Компани, Инк. Фильтр и система вентиляции картера
EP1858618B1 (fr) 2005-02-22 2009-09-16 Donaldson Company, Inc. Separateur d aerosol
DE202005003046U1 (de) * 2005-02-24 2006-07-06 Hengst Gmbh & Co.Kg Filtereinsatz für einen ring- oder bogenförmigen Gasfilter
CN101652168A (zh) 2007-02-22 2010-02-17 唐纳森公司 过滤元件及其方法
EP2125149A2 (fr) 2007-02-23 2009-12-02 Donaldson Company, Inc. Élément de filtre formé
US9885154B2 (en) 2009-01-28 2018-02-06 Donaldson Company, Inc. Fibrous media
CN103752104B (zh) * 2014-01-28 2016-06-29 浙江吉天环保科技有限公司 高温滤筒除尘器
EP2908067B1 (fr) * 2014-02-18 2022-04-13 Blueair AB Dispositif de purification d'air avec mécanisme de couplage
EP2908064B1 (fr) 2014-02-18 2020-02-12 Blueair AB Dispositif de purification d'air avec des moyens d'ionisation
EP3822555A1 (fr) 2014-02-18 2021-05-19 Blueair AB Dispositif de purification d'air avec conduit de ventilation
CN106247462A (zh) * 2016-09-30 2016-12-21 美的集团武汉制冷设备有限公司 竖式壁挂空调室内机和空调器

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928008A (en) * 1974-08-05 1975-12-23 Ross K Petersen Filtering apparatus
US3936284A (en) * 1974-08-16 1976-02-03 Mason Engineering And Designing Corporation Air filtering apparatus
US4265643A (en) * 1977-10-11 1981-05-05 Dawson Edward S Air purifier
US4629482A (en) * 1985-08-05 1986-12-16 Enviracaire Corporation HEPA room air purifier
US4737173A (en) * 1986-07-03 1988-04-12 Amway Corporation Room air treatment system
US4778496A (en) * 1987-11-13 1988-10-18 William R. Eckstrom High efficiency particulate air filter cabinet
US5078764A (en) * 1989-02-15 1992-01-07 Control Resource System Air purification apparatus
US5102435A (en) * 1991-03-11 1992-04-07 Hako Minuteman, Inc. Vacuum suction machine with high efficiency filter and operating interlock
US5131932A (en) * 1990-09-11 1992-07-21 Bionaire, Inc. Filter replacement indicator
US5230723A (en) * 1990-11-14 1993-07-27 Abatement Technologies Portable filtration unit
US5259854A (en) * 1992-12-23 1993-11-09 Gpac, Inc. Disposable HEPA filtration device
US5290330A (en) * 1993-06-10 1994-03-01 The Johns Hopkins University HEPA filtration system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5512086A (en) * 1994-06-14 1996-04-30 Appliance Development Corporation High-efficiency air filtering apparatus

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928008A (en) * 1974-08-05 1975-12-23 Ross K Petersen Filtering apparatus
US3936284A (en) * 1974-08-16 1976-02-03 Mason Engineering And Designing Corporation Air filtering apparatus
US4265643A (en) * 1977-10-11 1981-05-05 Dawson Edward S Air purifier
US4629482A (en) * 1985-08-05 1986-12-16 Enviracaire Corporation HEPA room air purifier
US4737173A (en) * 1986-07-03 1988-04-12 Amway Corporation Room air treatment system
US4778496A (en) * 1987-11-13 1988-10-18 William R. Eckstrom High efficiency particulate air filter cabinet
US5078764A (en) * 1989-02-15 1992-01-07 Control Resource System Air purification apparatus
US5131932A (en) * 1990-09-11 1992-07-21 Bionaire, Inc. Filter replacement indicator
US5230723A (en) * 1990-11-14 1993-07-27 Abatement Technologies Portable filtration unit
US5102435A (en) * 1991-03-11 1992-04-07 Hako Minuteman, Inc. Vacuum suction machine with high efficiency filter and operating interlock
US5259854A (en) * 1992-12-23 1993-11-09 Gpac, Inc. Disposable HEPA filtration device
US5290330A (en) * 1993-06-10 1994-03-01 The Johns Hopkins University HEPA filtration system

Cited By (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5753002A (en) * 1994-06-14 1998-05-19 Appliance Development Corp. High-efficiency air filter
US5984991A (en) * 1996-01-25 1999-11-16 Appliance Development Corp. High-efficiency air filter
US5997674A (en) * 1997-12-11 1999-12-07 Holmes Products Corp. Air purifier and method of manufacture
US5893939A (en) * 1997-12-11 1999-04-13 Holmes Products Corp. Air purifier and filter assembly therefor
EP0933600A2 (fr) * 1998-02-02 1999-08-04 Carrier Corporation Purificateur d'air
EP0933601A2 (fr) * 1998-02-02 1999-08-04 Carrier Corporation Cadre de montage pour filtre
EP0933600A3 (fr) * 1998-02-02 2001-09-26 Carrier Corporation Purificateur d'air
EP0933601A3 (fr) * 1998-02-02 2001-09-26 Carrier Corporation Cadre de montage pour filtre
US20050144914A1 (en) * 1999-07-07 2005-07-07 The Holmes Group, Inc. Air purifier
US7041147B2 (en) 1999-07-07 2006-05-09 Jcs/Thg, Llc Air purifier
US6425932B1 (en) 1999-07-07 2002-07-30 The Holmes Group, Inc. Air purifier
US6610118B2 (en) 1999-07-07 2003-08-26 The Holmes Group, Inc. Air purifier
US20030126844A1 (en) * 1999-07-07 2003-07-10 Barry Huehn Air purifier
US6685760B2 (en) 1999-07-07 2004-02-03 The Holmes Group, Inc. Filter assembly for air purifier
US20040168416A1 (en) * 1999-07-07 2004-09-02 Barry Huehn Filter assembly for air purifier
US7276100B2 (en) 1999-07-07 2007-10-02 Sunbeam Products, Inc. Air purifier
US20060185333A1 (en) * 1999-07-07 2006-08-24 Jcs/Thg, Llc. Air purifier
US6866695B2 (en) 1999-07-07 2005-03-15 The Holmes Group, Inc. Filter assembly for air purifier
US6461396B1 (en) 1999-07-07 2002-10-08 The Holmes Group, Inc. Air purifier
US20030208877A1 (en) * 2002-05-07 2003-11-13 Stanovich Michael A. Mobile air duct vacuum
US6834412B2 (en) 2002-05-07 2004-12-28 D.P.L. Enterprises, Inc. Mobile air duct vacuum
US20040261376A1 (en) * 2003-06-26 2004-12-30 Morgan Lee Pendleton Pleated air filter with reverse pulsating air flow cleaning
US20090078116A1 (en) * 2003-06-26 2009-03-26 Lee Pendleton Morgan Adaptable dual-directional, differential pressure assembly
US7722699B2 (en) * 2003-06-26 2010-05-25 Camfil Farr, Inc. Adaptable dual-directional, differential pressure assembly
US20050086918A1 (en) * 2003-10-24 2005-04-28 Honisch Michael J. Air cleaner assembly
US7282077B2 (en) 2003-10-24 2007-10-16 Briggs & Stratton Corporation Air cleaner assembly
EP2799123A1 (fr) 2004-06-24 2014-11-05 Camfil Farr, Inc. Filtre à air plissé avec inversion de nettoyage d'écoulement d'air pulsé
US7833309B2 (en) 2005-07-14 2010-11-16 Access Business Group International Llc Air treatment system
US20090188222A1 (en) * 2005-07-14 2009-07-30 Access Business Group International Llc Air treatment system
US20090188221A1 (en) * 2005-07-14 2009-07-30 Access Business Group International Llc Air treatment system
US20090188223A1 (en) * 2005-07-14 2009-07-30 Access Business Group International Llc Air treatment system
US20090188218A1 (en) * 2005-07-14 2009-07-30 Access Business Group International Llc Air treatment system
US20070012192A1 (en) * 2005-07-14 2007-01-18 Access Business Group International Llc Air Treatment System
US7828868B2 (en) 2005-07-14 2010-11-09 Access Business Group International Llc Air treatment system
US7537649B2 (en) * 2005-07-14 2009-05-26 Access Business Group International Llc Air treatment system
US7837773B2 (en) 2005-07-14 2010-11-23 Access Business Group International Llc Air treatment system
US7914598B2 (en) 2005-07-14 2011-03-29 Access Business Group International Llc Air treatment system
US8105409B2 (en) 2009-01-30 2012-01-31 General Electric Company Filter retention system
US8048186B2 (en) 2009-04-02 2011-11-01 General Electric Company Filter retention systems and devices
US20100251678A1 (en) * 2009-04-02 2010-10-07 General Electric Company Filter retention systems and devices
CN104145111A (zh) * 2012-03-01 2014-11-12 斯堪尼亚商用车有限公司 过滤器外壳和过滤器单元
KR20140131386A (ko) * 2012-03-01 2014-11-12 스카니아 씨브이 악티에볼라그 필터 하우징 및 필터 유닛
US20150020486A1 (en) * 2012-03-01 2015-01-22 Scania Cv Ab Filter housing and air filter unit for a combustion engine
US20150033684A1 (en) * 2012-03-01 2015-02-05 Scania Cv Ab Filter housing and filter unit
US9334771B2 (en) 2012-03-01 2016-05-10 Scania Cv Ab Filter unit in a filter housing
US9334770B2 (en) * 2012-03-01 2016-05-10 Scania Cv Ab Filter housing and filter unit
US20140168871A1 (en) * 2012-12-19 2014-06-19 Airbus Operations Sas Electronics structure comprising at least one barrier impermeable to fine particles
US9888608B2 (en) * 2012-12-19 2018-02-06 Airbus Operations Sas Electronics structure comprising at least one barrier impermeable to fine particles
US9631222B2 (en) 2014-03-14 2017-04-25 Particle Measuring Systems, Inc. Filter and blower geometry for particle sampler
JP2015196117A (ja) * 2014-03-31 2015-11-09 日本無機株式会社 フィルタエレメント、フィルタエレメント組立体、および空気清浄システム
US11938433B2 (en) 2016-02-26 2024-03-26 Lg Electronics Inc. Air cleaner
US11905967B2 (en) 2016-02-26 2024-02-20 Lg Electronics Inc. Air cleaner
US11761455B2 (en) 2016-02-26 2023-09-19 Lg Electronics Inc. Air cleaner
US11982288B2 (en) 2016-02-26 2024-05-14 Lg Electronics Inc. Air cleaner
US11666846B2 (en) 2016-02-26 2023-06-06 Lg Electronics Inc. Air cleaner
US11452961B2 (en) * 2016-02-26 2022-09-27 Lg Electronics Inc. Air cleaner
US11090598B2 (en) 2016-02-26 2021-08-17 Lg Electronics Inc. Air cleaner
US20220274042A1 (en) * 2016-06-15 2022-09-01 Lg Electronics Inc. Air cleaner
US11890569B2 (en) * 2016-06-15 2024-02-06 Lg Electronics Inc. Air cleaner
US11364459B2 (en) * 2016-06-15 2022-06-21 Lg Lelectronics Inc. Air cleaner
US10722990B2 (en) 2016-09-15 2020-07-28 General Electric Company Method for installing and removing modularized silencer baffles
US10119469B2 (en) 2016-09-15 2018-11-06 General Electric Company Method and apparatus for modularized inlet silencer baffles
CN108119264B (zh) * 2016-11-30 2020-01-10 丰田纺织株式会社 用于内燃机的筒状空气滤清器
CN108119264A (zh) * 2016-11-30 2018-06-05 丰田纺织株式会社 用于内燃机的筒状空气滤清器
US10550766B2 (en) 2017-01-06 2020-02-04 General Electric Company System and method for an improved inlet silencer baffle
US10385778B2 (en) 2017-01-06 2019-08-20 General Electric Company System and method for an improved inlet silencer baffle
US20220290882A1 (en) * 2021-03-15 2022-09-15 Shenzhen Vantop Technology & Innovation Co., Ltd. Air purifier
CN117463705A (zh) * 2023-12-27 2024-01-30 四川合佳科技有限公司 一种用于物联网的无线通信模块的保护装置
CN117463705B (zh) * 2023-12-27 2024-03-19 四川合佳科技有限公司 一种用于物联网的无线通信模块的保护装置

Also Published As

Publication number Publication date
GB9622958D0 (en) 1997-01-08
WO1995034366A1 (fr) 1995-12-21
DE19581669T1 (de) 1997-07-17
GB2302292A (en) 1997-01-15
US5753002A (en) 1998-05-19
GB2302292B (en) 1998-02-25

Similar Documents

Publication Publication Date Title
US5512086A (en) High-efficiency air filtering apparatus
US5984991A (en) High-efficiency air filter
US6156089A (en) Two-stage air filter with multiple-layer stage and post-filter stage
US6997968B2 (en) Filter element having sealing members and methods
US5944860A (en) Air plenum filter adapter component
US3793813A (en) Pleated filter assembly
US5972059A (en) Air filter assembly
AU751392B2 (en) Vacuum cleaner having a dual filter assembly
US7425226B2 (en) Fluid filter with canted fanfold pleats
US4817708A (en) Ventilating unit for drawing and exhausting air
US5188644A (en) Filter, bag and method
US20030037521A1 (en) Liquid resistant filter assembly
EP1125622A2 (fr) Système de filtration d'air
US5716521A (en) Rechargeable filter
CN105823197B (zh) 一种空气净化器
GB2147799A (en) Vacuum cleaner with a filter
JP2000262828A (ja) 空気清浄機
KR20030047609A (ko) 진공청소기용 싸이클론식 집진유니트
US7531019B1 (en) High air flow/power ratio, small footprint, household room air purifier
GB2149686A (en) Gas filters and apparatus
CN210425341U (zh) 一种空气净化器
CN210302846U (zh) 空气净化器
JPH0320677Y2 (fr)
JPH04322712A (ja) 空気清浄機
JP2747813B2 (ja) エアクリーナ

Legal Events

Date Code Title Description
AS Assignment

Owner name: APPLIANCE DEVELOPMENT CORP., MASSACHUSETTS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GLUCKSMAN, DOV Z.;REEL/FRAME:007150/0858

Effective date: 19940809

FPAY Fee payment

Year of fee payment: 4

REMI Maintenance fee reminder mailed
REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
FP Lapsed due to failure to pay maintenance fee

Effective date: 20040430

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362